Earth moving device



Aug. 29, 1933. R. 1 `HARRISON 1,924,360

EARTH HOVING DEVICE um sept. so," 1931 Patented Aug. 29,V 1933 UNITEDSTATES Ean'm Movmo DEVICE Raymond L. Harrison, Albuquerque, N. Mex.

Application september so, 1931 Serna N. 566,061

3 Claims.

My invention relates generally to earth moving devices or scrapers, andparticularly to improvements in hydraulically controlled Scrapers.

The present invention is particularly l con- 5 cerned with Scraperscommonly referred to as.

rotary or roll-over type Scrapers, namely, devices ln which the scraperbowll is adapted to revolve completely about its axis. It has been thepractice in certain instances to elIect the dumping of these roll-overtype scraper bowls by merely unlatching the shiftable actuator bar so asto permit the rolling of the scraper bowl across the surface of the soilin response to the pulling force exerted by the tractor. As the bowlrolls forwardly, its load is automatically dumped, and upon subsequentlyreaching a cutting position, said bowl becomes automatically latched inthis position. Itis desirable in certain instances to positively controlnot only the rearward tilting of the bowl, but also the forward tiltingthereof, or, in other words, to positively control the dumping of thebowl. Mechanical devices with which I am familiar and which have beenemployed heretofore to shift Scrapers, shovels, and other earth movingdevices, are extremely slow in operation, due to the fact that a largeamount of power is required to Shift a loaded scraper, and hence it hasbeen impractical to provide mechanical devices to effect a quick orsudden shifting of the bowl. I have found that by employing a hydraulicmechanism for shifting the scraper bowl, said bowl may be instantlyshifted from carrying position to another forward position by the meremanipulation of a control handle conveniently positioned adjacent theoperator.

It is one of the primary objects of. my present invention, therefore, toprovide improved hydraullc control means for positively Shifting thescraper bowl forwardly with a minimum amount of eii'ort and skill o nthe part of the operator, and to this end I propose to provide a latchmechanism for engaging a projection on the scraper bowl, which latchmechanism may be positively shifted either 'forwardly' or rearwardlythrough the action of a hydraulic mechanism, such as a piston shiftablewithin a cylinder.

More speciilcally, my invention contemplates the provision of a scrapermechanism w above set forth, in which the hydraulic actuator is coupledwith a reciprocable actuating mechanism for engaging an abutment or stopon the scraper bowl, said hydraulic actuator being positively shiftablein either direction to rotate the bowl actuating mechanism in eitherdirection.

Still more specically, my invention contemplates the provision of ahydraulic actuator, as above set forth, which may be controlled by amanually operable valve mechanism conveniently positioned the tractor.,v

These and numerous other objects and advantages will be more apparentfrom the following detailed description when considered in connectionwith the accompanying drawin whereini l Figure 1 is a side elevationalview of a mechanism which represents one embodiment of my invention; 1

Figure 2 is a'fragmentary plan view of the structure disclosed in Figure1; and

Figures 3 to 5 inclusive are Sectional views of the control valvedisclosing the various positions occupied thereby, Figure 3 disclosingthe closed position of the valve; `Figure 4, the position occupied bythe valve to effect the forward shifting of the actuator piston, andFigure 5, the

adjacent the operators seat on position occupied by the valve forshiftingA said actuator piston rearwardly.

Referring now to the drawing more indetail, wherein like numerals havebeen employed to designate similar parts throughout thevarious figures,it will be seen that for the purpose of illustrating one practicalembodiment of my invention, I have shown the same in combination with ascraper device, which is similarin many respects to the scrapermechanism disclosed in my co-pending application, Serial No. 529,378,led April 11, 1931. I have disclosed an earth carrying means or scraperbowl 10, which is rotatable upon trunnions 12 supported by a draft frame14. This scraper bowl 10 includes a casing 16, which is substantially'semi-circular in cross section, and mounted upon the periphery of thiscasing intermediate the ends thereof is a bracket 18. This bracket 18 isadjustably positioned along the periphery of the casing 16, and carriesa pin or stop member 20 which is adapted to be positioned between apairl of dogs 22 and 24 supported at the free end of a reciprocableactuating bar 26. 'I'he dog 24 is pivoted at 28 so as to permit the freeupward tilting thereof when the stop or abutment 20 is movedthereagainst as said stop shifts in a clockwise direction as viewed inFigure 1. The dog 24 is prevented from shifting downwardly by means of alug 30, and the weight ofthe dog serves to normally urge it toward theposition disclose-d in Figure l.. The dog 22 is pivoted at 32 upon thebar 26 and lis adapted at its free extremity to engage a latch lever 34,which is also pivotaliy supported by the bar 26. occupies the positionshown in Figure l. it preventel the counter-clockwise rotation of the`clog 22, and thereby presents a positive abutment for the stop 20. Whenthe lever 34 is tripped by exerting a pull on a cord rv 36, the dog 22is released to permit forward movement ofthe pin 20. A spring 38 serves'to normally urge the When the lever 34 lll latch lever 34 to theleft,Figure 1, and a spring 4Q operates toretain the pivoted dog 22 in itsVnormal position shown in Figure 1.

A hydraulic actuator 42 which includes a cylinder 44 and a piston V46,is connected with the latch bar26. The ow' of duid, such as oil throughflexible conduits 48 and 50, is controlled by a valve 52. This valve 52includes a rotary valve member 54, Figures 3 to 5 inclusive, which isshiftedby means Vof a manually manipulated handle 56.- When the valvemember 54 occupies the position shown in Figure 3, oil from a suitablepump ;.58 driven by suitable .mechanism (not shown) provided on aLtractor designated generally' by the numeral 60, is prevented fromflowing through a discharge pipe 62, Figure 1. When r thevalve 54 isshifted to the left, as indicated in Figures 1 and 5, a valve 'port64connects the pipe 62 with the flexible conduit 48, yand a valve port66 connects the iiexible conduit 50 with a return pipe line 68. Thusfluid under pressure is directed against' the right end of the piston46, thereby urging said piston rearwardly or to the left, Figure l. Whenthe valve member 54 occupies the position shown in Figure 4, a reversalof fluid flow takes places, which causesthe piston 46 to be shiftedforwardly or to the right, Figure 1.

With the pin or stop 20 positioned between the dogs 22 and 24, as shownin Figure 1, it will be apparent that the hydraulic actuator 44l isadapted to-eilect rotation of the scraper bowl 10 in either direction.In other words, it requires only the manual manipulation of the valvehandle 56 to positively control` the shiftl ing of thescraper bowl ineither direction. In

' the .disclosed embodiment I have shown a cam 70 which cooperates withapin 72 to cause the latch dogs 22 and 24 to follow an arcuate path,which corresponds to the periphery of the bowl l10 during thereciprocation of the bar 26. I

. have also shown a trailer mechanism '74, which includes a pair oftrailer wheels 'I6 pivotally connected with the trunnions 12 through theagency of frame members or links 78.\ Pins or abutments supported by theframes or links 'I8 are adapted -to be engaged by a pivoted member 82when the bowl is shifted rearwardly so as to eiect the upward shiftingof the bowl. Obviously the invention is not limited to the specictrailer construction Ashown in the drawing, but contemplates the use ofa hydraulic mechanism, which is positivelyv shiftable in either'direction in combination with various types of rotary scraper devices. lFroml the foregoing it will be apparent that my invention contemplates averysimple hydraulic control for a scraper or bowlwhich is particularlyadaptable for use in. connection with' scraper bowls oftheroll-over-type. By employing a hydaulic mechanism for shifting thedesired location has been reached. That. iste.

say, in instances where it is desired to dump a load of soil in apredetermined position, this can be accomplished by lmerely shifting thecontrol handle 56 to the. right, Figure 1, so as to apply uid pressure'to the left side of the piston 46, thereby eecting the forward orclockwise rotation of the bowl. The positive control of the bowl in itsforward rotation may not be required :,eeaseo for dumping purposes, butmay be requiredin shifting the bowl `from 'carrying to cutting position,and this may be accomplished by merely positioning the bracket 18, whichsupports the stop orpin 20 at the proper position along the peripheralsurface of the bowl casing 16. It will be noted that I have provided aplurality of apertures 8,4,within the casing 16 so as to enable theconvenient shifting of the bracket 18 to any desired position.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In an earth moving device vof the class described adapted to be drawnacross the surface of the ground, a rotary earth carrying means having amaterial receiving edge, a frame pivotally supporting said earthcarrying means, a hydraulic actuator including a cylinder and a pistonwhich is positively shiftablein either direction therein, a latchmechanism including a pair ot oppositely disposed dogs, an abutmentmovable with the tiltable earth receiving means adapted to be positionedbetween said dogs, means connecting said latch mechanism with saidhydraulic actuator, means for controlling the operative effectiveness ofat least one of said dogs,

and a valve mechanism for controlling the delivery of fluid underpressure to either side of the piston in said actuator, whereby topositively control the tilting of the earth carrying means -in eitherdirection.

abutment movable with the tiltable earth receiving means adapted to bepositioned between said dogs, means connecting said latch mechanism withsaid hydraulic actuator, means for controlling the operativeeffectiveness of at least one of said dogs, arid a valve mechanism forcontrolling the delivery of fluid under pressure to either side of thepiston in said actuator, whereby to positively control the tilting ofthe earth carrying means in either direction. v

3. In an'earth moving device of the class described adapted to be drawnacross the surface of the ground, a rotary earth carrying means having amaterial receiving edge, a frame pivotally supporting said earthcarrying means, a hyconstruction, said actuator being positivelyshiftable in either direction, a latch mechanism including a pair ofoppositely disposed dogs, an abut-ment vmovable with the tiltable earthreceiving means adapted to be positioned between said' dogs, meansconnecting said latch mechanism with said hydraulic actuator,` means forcontrolling the operative effectiveness of at least one of said dogs, avalve mechanism for controlling the delivery ofnuid under pressure toeither side of the piston in said actuator, whereby to positivelycontrol the tilting of the earth carrying means in either direction, anda trailer device cooperatively associated with the rotary earth carryingmeans to effect the vertical disposition thereoi in response to themovement of said hydrauiic actuator.

, RAYMOND L. HARRISON.

iso

draulic actuator including a cylinder and piston

